1391875 has 20 divisors (see below), whose sum is σ = 1855656. Its totient is φ = 1040000.

The previous prime is 1391861. The next prime is 1391893. The reversal of 1391875 is 5781931.

It is a happy number.

It is not a de Polignac number, because 1391875 - 2⁹ = 1391363 is a prime.

It is a Duffinian number.

Its product of digits (7560) is a multiple of the sum of its prime factors (168).

It is a self number, because there is not a number n which added to its sum of digits gives 1391875.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10560 + ... + 10690.

2^1391875 is an apocalyptic number.

1391875 is a deficient number, since it is larger than the sum of its proper divisors (463781).

1391875 is an equidigital number, since it uses as much as digits as its factorization.

1391875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 153 counting only the distinct ones).

The product of its digits is 7560, while the sum is 34.

The square root of 1391875 is about 1179.7775213997. Note that the first 3 decimals coincide. The cubic root of 1391875 is about 111.6520611575.

It can be divided in two parts, 1 and 391875, that added together give a square (391876 = 626²).

The spelling of 1391875 in words is "one million, three hundred ninety-one thousand, eight hundred seventy-five".